Vitelliform macular dystrophy

Vitelliform macular dystrophy (VMD), also known as Best disease, is a rare, genetic eye disorder that affects the retina. It is characterized by the accumulation of yellowish material in the macula, the central part of the retina responsible for sharp, central vision.

Symptoms

The symptoms of Vitelliform macular dystrophy typically begin in childhood or adolescence, although they can appear later in life. The most common symptom is a gradual decline in central vision, which can affect one or both eyes. Other symptoms may include distorted vision (metamorphopsia), trouble distinguishing between colors (color blindness), and sensitivity to bright light (photophobia).

Causes

Vitelliform macular dystrophy is caused by mutations in the BEST1 gene. This gene provides instructions for making a protein that is found in the retina. The protein plays a crucial role in the normal functioning of the retina's light-sensing cells. Mutations in the BEST1 gene disrupt the normal functioning of these cells, leading to the symptoms of Vitelliform macular dystrophy.

Diagnosis

Diagnosis of Vitelliform macular dystrophy is typically made through a comprehensive eye examination, including a detailed examination of the retina. Additional tests may include electroretinography (ERG), optical coherence tomography (OCT), and genetic testing to identify mutations in the BEST1 gene.

Treatment

There is currently no cure for Vitelliform macular dystrophy. Treatment is focused on managing symptoms and slowing the progression of the disease. This may include the use of low-vision aids, such as magnifying glasses and large-print materials, and referral to services for individuals with visual impairment.

Prognosis

The prognosis for individuals with Vitelliform macular dystrophy varies. Some individuals may maintain good vision into adulthood, while others may experience a significant decline in vision. Regular follow-up with an ophthalmologist is important to monitor for changes in vision and to manage any complications that may arise.

See also

• Macular degeneration
• Retinal diseases
• Genetic disorders

References

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